Insulator for electric wires



w. 1). TRIMBLE. INSULATOR FOR BLEGTRIG WIRES.

(No Model.)

No. 503,778. Patented Aug. 22, 1893.

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UNITED STATES PATENT OFFICE.

WVILLIAM D. TRIMBLE, OF I-IANESVILLE, MARYLAND.

INSULATOR FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent No. 503,778, dated August22,1893.

Application filed April 14. 1893- Serial No. 470,288- (No model.)

To all whom, it may concern:

Be it known that I, WILLIAM D. TRIMBLE, a citizen of the United States,residing at Ilanesville, in the county of Kentand State of Maryland,haveinvented certain new and usefulImprovements in Insulators for Electricfires, of which the following is a specification.

My invention relates to an improvement in insulators for electriccircuit wires.

It has for its object to provide a simple and convenient insulatingdevice for stringing up or supporting the wires.

In the accompanying drawings, Figure 1, Is a perspective View of thepreferred form of supporting device and showing the Insulators. Fig. 2,is a detail View of an Insulator. Fig. 3 is a view showing a series ofInsula tors secured to a rod. Fig. 4:, is a view showing a modified formof insulator and socket therefor.

Referring to the drawings theletters, A, indicate supporting arms; B,sockets orholders secured to the extremities of the supporting arms; C,insulators fitting within the said sockets, B. Each socket or holder, inthe preferred form, comprises a partly cylindricshaped box having alongitudinal slot, b, and a notch or slot,b',transverse to thelongitudinal slot.

The insulators may of course be made of any suitable insulatingmaterial.

Each insulator is externally cylindric and has a longitudinal bore, 0,to receive the electric wire, and a boss, 0, upon its cylIndric surfacefor retaining it within the socket, B.

The insulator comprises two blocks, each of half-cylindric form in orderthat they may inclose the electric wire without the necessity ofthreading the said wire through the longitudinal bore, 0, as wouldotherwise be necessary. The line of division between the two blocks ormemberspreferably extends through the boss, 0', and divides it into twoparts.

To insert the insulator within its socket the two members which comprisethe insulator, are brought together with their fiat surfaces in contact.The insulator is then slid endwise into the socket, until the boss, 0,is opposite the transverse slot, 1), when it is given a lat-' eral turnso that it will enter the said transverse slot;

can only be removed by reversing the process by which it was entered.Both of said blocks are prevented from slipping out of the socket by theboss, 0', one part of which is on each of the blocks. A flange, 0 may,be secured upon one end of the insulator, part on each block, in whichcase, when the said insu lator is inserted. in the socket, it is pusheddown till the flange strikes against the socket, when the boss will beopposite the transverse slot in the socket and may be entered therein bysimply turning the insulator.

In the modified form shown in Fig. 4, the insulator is conical insteadof cylindrical in which case of course the socket must be madecorrespondingly conical, and it is preferable in this case to make theslot, b,inclined with respect to the longitudinal slot instead oftransverse to it as in the other case, so that when the conicalinsulator is inserted in the conical s0cket,the boss being forced up theinclined slot, will draw the insulator closely within the socket.

In the device as shown in Fig. 1, two arms, A, formed integral, bear twosockets, B, at their extremities and midway between said sockets thereis a screw, D, rigidly secured to and projecting from the arms. When itis desired to secure the device to a wall, the arms, A, are used aslever-handles with which to turn the screw to drive it into the wood,thus fastening the device, sockets and all, in position. While but twosockets are shown attached to the arms, yet it will be easily seen thatthe number is not limited to the particular number shown.

In Fig. 3, of the drawings, a series of sockets are shown attached to arod, E. They may be fastened thereon in. any desired man- Having thusdescribed my invention, I claim as new and desire to secure by LettersPatent- 1. In an insulator-supporting device for electric wires, thecombination of the socket, interiorly circular in cross-section, havinga longitudinal slot, and a slot transverse to said longitudinal slot andextending part-1y around the socket 5 and an insulator exteriorly roundin cross-section fitting within the socket and adapted to turn thereinand having a boss fitting within thetransverse slot of the socket.

2. As an article of manufacture an insulating supporting device forelectric wires, comprising integral arms; sockets upon the arms;insulators fitting within the sockets; and a screw rigidly secured toand projecting from the said arms, whereby the said arms can be used aslever-handles for driving the screw to secure the device in position.

3. In an insulating supporting device for electric wires, thecombination of a conical

